Method and apparatus for handling yarns



Dec. 30, 1952 Filed July 6. 1950 H. J. MCDERMOTT 2,623,240

METHOD AND APPARATUS FOR HANDLING YARNS 2 Sl-IEETSSI-IEET l INVENTOR. HENRY J. MCDERMOTT A TTORNE Y.

Dec. 30, 1952 H. J. MODERMOTT METHOD AND APPARATUS FOR HANDLING YARNS 2 Sl-lEETS-Sl-IEET 2 Filed July 6, 1950 INVENTOR HENRY a. McDERMbTT Arroq Y.

Patented Dec. 30, 1952 UNITED STATE s PATENT. OFFICE Henry J. Mc bermott, Collingdale, Pa., assignor to American Viscose Corporation, W

Del., a corporation of Delaware 7 Application 6, 1950, Serial No. 172.224

17 Claims.

1 This invention relates to methods and apparatus for handling yarns on yarn-storage yarnadvancing devices. More particularly, this invention relates to methods and apparatus for handling a plurality of yarns together on a yarnstorage yarn-advancing device whereby the yarns are advanced together in closely spaced helical turns of the plurality of the yarns along the yarnstorage yarn-advancing device and the yarns are separated irom each other as they are withdrawn from the device.

Yarns are advanced in helical turns on yarnstorage yarn-advancing devices which are well known in the art while the yarns are being merely stored, subjected to liquid treatment, or dried. Where attempts have been made to advance a plurality of yams together in helical turns along a yam-storage yarn-advancing device, it has been fomidnecessary to maintain the turns of yarns out of contact with each other and relatively widely spaced apart along the device so that the yarns could be separately withdrawn from the device. This required a relatively long yarn-storage yarn-advancing device or else only a relatively iew turns of yarn could be advanced along the device. I

In accordance with the methods and apparatus 01 the present invention, a plurality of yarns are advanced together in spaced helical turns along a yarn-storage yarn-advancing device with each of the turns comprising the yarns in proximity to one another, either associated together or spaced a slight distance apart, and the yarns are separated from each other as they are withdrawn from the device. In this invention the plurality oi yarns are directed to a yam-storage yamadvancing device in spaced apart relation, and

the yarns are allowed to become in proximity to one another in side by side or superposed relation as the turns of the plurality of yarns are advanced along the device to the discharge position. The position of one or more of the yarns being directed to the device is shifted laterally relative to one or more of the other yarns being directed to the device. The distance a yarn is shitted is approximately the distance it is desired to have the diflerent yarns separated from -eiatch other as the yarns come of! the discharge end of the device. This distance may be varied depending on the size of the yarns and their condition as to wetness with treating liquid ii the yarns are wet. The desired distance is that sufliclent to overcome any capillarity between the yarns as they are being discharged from the device if they are wet and sufllcient to permit each yarn to be separately engaged by a hook or the fingers of the operator so that each yarn may be separately directed to a take-up means or another yam-storage yarn-advancing device.

In the operation of yarn-storage yarn-advancing devices. spaced helical turns of yarn are formed and are advanced uniformly spaced apart along the device. The distance along the device between adjacent turns of the yarnis the pitch of the device. In devices oi. the type shown in the patents to Stanley No. 2,419,605 and Weaver No. 1,920,224 a turn of yarn advances along the device a distance equal to the pitch, each revolution of the device.

The yarn is shifted laterally a distance approximately equal to the pitch of the device to which the yarn is being directed, or if desired, the yarn is shifted laterally a distance that is approximately equal to a multiple of the pitch of the device to which the yarn is being directed. In other words, the yarn is shifted a distance that is approximately equal to a whole number times the pitch.

This shift in the position of a separate yarn being directed to the device causes a shift or displacement oi' this yarn relative to the other yarns on the device. when the portion of the yarn that had been shifted comes to the discharge location on the device, it is in a position spaced along the device from the position in which the preceding portion of the yarn was discharged. In this way the difierent yarns are spaced apart from each other at the discharge location on the device, and the yarns are separated from each other as they are discharged from the device.

The methods and apparatus of the present invention may be used in the storage, liquid treatment, and drying of a plurality of yarns together on a single yarn-storage yarn-advancing device or on a plurality of such devices in succession and are particularly adapted for use in the manufacture of artificial yarns by the viscose or other process.

The invention has for its principal object to provide methods and apparatus for handling a plurality of yarns together in closely spaced helical turns of the plurality of the yarns on a yarnstorage yam-advancing device whereby the yarns are separated from each other as they are removed from the device.

Another object of the invention is to provide methods and apparatus for handling on a yarnstorage yarn-advancing device a plurality of yarns in a wet condition, in closely spaced helical 3 turns of the plurality of yarns whereby the yarns are separated from each other as they are removed from the device. Another object of the invention is to provide methods and apparatus for handling a plurality,

of yarns together in closely spaced helical turns of the plurality of yarns on a plurality of yamstorage yarnadvancing devices in succession whereby the yarns are separated from each other as they are removed from each of the devices.

A further obiect of the invention is to provide improvements in methods and apparatus for spinning artificial filaments in which a plurality of yarns are separately formed and are advanced continuous spinning and processing machine for artificial filaments in which the invention is embodied.

Figure 2 is an elevational view of the apparatus shown in Figure l in which a second step in the method of the invention is illustrated.

Figure 3 is an elevational view of a form of continuous spinning and processing machine for artificial filaments which also includes means for drying and packaging the filaments in which the invention is embodied.

Figure 4 is an elevational view of the machine that is shown in Figure 3 and in which a further step in the method of the invention is shown.

Figure 5 is an enlarged elevational view of a form of guide means with which the invention may be practiced.

Figure 6 is an enlarged view of another form of guide means with which the invention may be practiced.

Figure 7 is a diagrammatic view which shows the positions of the turns of the different yarns relative to each other on a yam-storage yamadvancing device before the position of one of the yarns being directed to the device is shifted relative to the position of another yarn that is being directed to the device.

Figure 8 is a diagrammatic view which shows the positions of the turns of the different yarns relative to each other on a yam-storage yarnadvancing device right after the position of one of the yarns being directed to the device is shifted relative to the position of the other yarn that is being directed to the device in one form of the invention.

Figure 9 is a diagrammatic view which shows the positions of the turns of the diflerent yarns relative to each other one of which yarns had been shifted relative to the other as shown in Figure 7, on a yam-storage yam-advancing device, Just before the portion of the yarn that has been shifted reaches the discharge position on the device.

Figure 10 is a diagrammatic view which shows the positions of the different turns of the yarns relative to each other on a yarn-storage yarnadvancing device after the portion of the yarn that had been shifted relative to the other reaches the discharge position on the device.

This invention may be used in handling thread, yarn, ribbon, bands, tow, and the like, and wherever the term "yam" is usedherein as above or hereinafter, it is intended to be inclusive.

.While the invention is shown in the drawings and described below in connection with the continuous spinning and processing of artificial yarns by the viscose process, it is to be understood that the invention is applicable to any machine or procedure in which yarn is handled on a yam-storage yam-advancing device.

Referring to the drawing, reference characters I and 2 indicate a pair of spinnerets positioned close together in side by side relation in a suitable spinning bath generally indicated by reference character 3. Viscose or other filamentfcrming material is extruded throughthe spinnerets to form the separate multi-fllament yarns A and B. The yarns are directed by the guide means 4 in spaced apart relation to the yarnstorage yarn-advancing device generally indicated by reference character 5.

The device 5 may be any type of yarn-storage yarn-advancing device such as for example that shown in the patent to Stanley No. 2,419,605, issued April 29, 1947, or a pair of rotatable drums that are canted relative to one another so as to advance helical turns of yarn along the drums such as those shown at the top of Figures 3 and 4 and indicated by reference characters H, or further, the device may be a larger number of canted rotatable rollers or drums such as shown inthe patent to Weaver No. 1,920,224, issued August 1, 1933. As shown by the arrow in Figure 1, helical turns of the yarns are advanced along the device 5' from the left to the discharge position at the right. The pitch of the device 5 is relatively large, for example one-third of an inch, and the distance between the yarns A and B as they are directed to this device as shown is greater than the pitch, for example one and one-half times the pitch, so that the helical turns of each yarn A and B are maintained spaced apart from each other while advancing along the device. While on the device 5, the yarns are merely stored and due to the distance between the turns of each yarn, the turns are separate from each other when they are discharged from the device. From the device 5 the yarns A and B are directed by the guide means 6 to the yarnstorage yam-advancing device I which may be of any of the conventional types as was stated above with respect to the device 5, but has a lower pitch, for example one-tenth of an inch, so that turns of yarn thereon are closer together. The guide means 6 which is positioned adjacent the take-up end of the device 1 is shown more, particularly in Figure 5 and is provided with the spaced apart yarn directing grooves or guide ways 8 and 9 each of which is adapted to direct or guide a single yarn or a plurality of yarns to gether. The distance between the yarn guide ways 8 and 9 is approximately the distance that it is desired that the yarns may be'separated as they are discharged from the device 1. This distance may be the pitch of the device I or several times the pitch if desired, or in other words, a whole number times the pitch. Instead of the guide means 6, guide means I! as shown in Figure 6 may be used. The guide means 11 is formed with the spaced apart yarn directing grooves or guide ways i8, i9 and 20, each of which is adapted to direct or guide a single yarn or a plurality of yarns together. The distance between the adjacent guide ways It and I9 and the distance between the adjacent guide ways I9 and are each approximately the distance it is desired that the yarns will be separated as they are discharged from the device. Each of these distances may be the pitch of the device I or several times the pitch if desired, or in other words. a whole number times the pitch. The yarns A and B are advanced in helical turns along the device I toward the left as shown in Figure 1 to the discharge position. The yarns A and B after being discharged from the device I are directed to the yam-storage yarn-advancing device III by means of the guide means II. The device It is of the same type as the device I with the-same or approximately the same pitch. The guide means I I is the same as the guide means 6 or I! with the distance between the adjacent guide ways in the guide II being approximately the distance it is desired that the yarns A and B will be separated as they are discharged from the device III or a whole number times the pitch. The yarns on the devices 'I and I0 are subjected to the various treating liquids used in the viscose process such as regenerating baths, washing, desulphurizing, bleaching, finish, and the like.

The yarns as shown in Figures 3 and 4 are directed to the yam-storage yam-advancing device generally indicated by reference character I! by means of the guide means It. The device I! comprises the rotatable drums I4 the axes of which are canted relative to each other so that spaced helical turns of the yarns may be advanced-along the device in the direction shown by the arrow. Means are provided for heating the drums so that the yarn may be dried thereon. Instead of the rotatable drums I4 any other form of yam-storage yarn-advancing device provided with drying means may be used. The pitch of the device I4 may be the same as that of the preceding device It or may be greater. The guide means I3 is of the same form as the guide means 6 or II with the distance between adjacent yarn guide ways being approximately the distance it is desired that the yarns A and B will be separated a; they are discharged from the device I2. This distance may be the pitch of the device I2 or several times the pitch, in other words, a whole number times the pitch. The yams after being discharged from the device I! are directed to a take-up means indicated generally by reference character I! where each of the yarns is separately wound in the form of a package.

Applicant's invention whereby diflerent yarns which are advanced together in closely spaced turns on a yam-storage yarn-advancing device may be separated as they are discharged from the device, may be practiced with the yam-storage yarn-advancing devices 1, III and I! as shown in advancing device I0 through one of the guide Y ways in the guide means II or after a number of the drawings and the method will be described with reference thereto.

The yarns A and B are directed in spaced apart relation to the device I by means of the spaced apart grooves or yarn directing guide ways 8 and 9 in the guide means I with yarn A in guide way 8 and yarn B in guide way 9. The yarns A and B are positioned together in approximately side by side relation on the device I after several turns have been formed because the distance between the yarns being directed to the device is equal to a whole number times the pitch and advance in this relation toward th discharge end of the device. After the turns of the two yarns A and B together have reached the discharge end,

and together in said side by side relation, have been directed to the next yarn-storage yam...

turns of the two yarns together have been formed on the device I so that the next device may be laced up with the yarns forming these turns by directing the two yarns together through one of the guide ways to the next device, one of the yarns is moved into the guide way with the other yarn as shown in Figure 2. Yarn A may be shifted laterally along the device and placed in the other guide way with yarn B, or yarn B may be placed in the guide way with the yarn A. When guide means II shown in. Figure 6 is used instead of the guide means 6, the yarn B may be directed to the yarn-storage yam-advancing device I by the yarn directing groove or guideway 20 and th yarn A directed to the device I by the groove or guide way I8. Either the yarn A or the yarn B may then be shifted laterally to the yarn directing groove or guide way I9, or the yarn B may be shifted laterally and placed in the groove or guide way I8 with the yarn A, or further, the yarn A may be shifted laterally and placed in the groove or guide way 20 with the yarn B. In another method the yarns may be directed to the device I with yarn B in the groove or guide way I9 and the yarn A in the groove or guide way I8. The yarn A is then shifted laterally and is placed in the groove or guideway 20. In an additional method the yarns may be directed to the device 1 with the yarn B in the groove 20 and the yarn A in the groove I9. The yarn B is then shifted laterally and is placed in the groove I8. This shift in the position of a separat yam being directed to the device causes a shift or displacement of this yarn relative to the other yarns and forms a lap of th yarns for a turn or a portion thereof on the device. When the first portion of the yarn that had been shifted comes to be discharged from the device, it is in a position spaced along the device from the position from which the preceding portion had been discharged. Th different yarns are spaced apart from each other at the discharge end of the device and therefore continue to be separated from each other as they are discharged from the device as shown in Figure 2; The separate yarns A and B are then manually separated at the guide means II and are directed through the guide ways in the guide means II in spaced apart relation to the yarn-storage yarnadvancing device III as shown in Figure 3. After several turns of the yarns A and B are formed on the device III, the yarns A and B are positioned together in side by side relation and continue in this manner as they are advanced along the device the same as the yarns on the device I. After the yarns A and B together have been discharged from th device III and the yarns together laced on the device I2 through one of the guide ways in the guide I3 or after a suflicient number of such turns of the yarns on th device II! have been formed so that the device I! may be laced up with them by directing the two yarns together through one of the guide ways to the device II as shown in Figure 3, either the yarn A or B is shifted laterally in the same manner as either of the yarns being directed to the device 1 were shifted in the guide means 6 or II as described above. This forms the lap of the yarns and causes the yarns A and B to be separated as they are discharged from the device III the same as on the preceding device I. In the same manner as on the devices I and III, the yams A and B are manually separated at the guide l9 and are directed to the yarn-storage yam-advancing device l2 as spaced apart relation through th spaced guide ways in the guide means i 3 as shown in Figure 4. After a number of turns of the yarns together have been formed on the device l2, either of th yarns. A or B, is shifted laterally into ano her guide way in the same manner as the yarns A and B being directed to the devices and I were shifted. This will cause the yarns to be separated from each other the same as on the preceding devices. The sep- Referring to Figures 7 to 10 of the drawing where the turns of yarns A and B are diagrammatically shown in section supported on a portion of a yarn-storage yarn-advancing device referred to generally by reference character D, the

positions of the turns of the diflerent yarns with respect to each other as one form of the method is carried out will be described.

Figure 7 shows the positions of the turns of the different yarns when the yarns are directed to the device spaced from each other a distance that is equal to the pitch of the device. The yarns A and B are directed onto the device in the positions AI and Bi respectively. After one revolution of the device, due to the pitch of the device each of the yarns are advanced to the right as shown by the arrow a distance equal to the pitch. The yarns are then in the positions A2 and B2. With succeeding revolutions of the device the turns advance to the positions A900 and B299 and so on. As shown due to the distance between the yarns as they are directed to the device, and the pitch, the turn A2 will be adjacent to the turn Bl. Likewise, A3 will be adjacent to B2 and so on to A300 adjacent to B299, for example. The turns of the two yarns A and B together are spaced apart along the device as shown. In discharging these yarns together from the device the adjacent yarns A and B will-be discharged together for example A900 and B299. Because of this. there is one less turn of one yarn than the other on the device that is discharging the yarns to another device or take-up means. When the yarn A is shifted laterally into the guide way with the yarn B as shown in Figure 8, the first turn of the yarn A will be in the position Al which is adjacent the turn of yarn A in the position A2 and the turn of yarn B in the position Bl. The different yarns in the first turn are in proximity to each other and if desired, the turn at Al could be positioned on top of the turn at A2. The lap that is formed advances to the discharge end of the device as shown in Figure 9. The yarn B is always discharged at the same position which is position B299 in this figure. Turn A- atposition A900 will be discharged with B but the adjacent turn of A at A299 will require another revolution of the device before it is discharged as this turn follows the turn at 900. As the device revolves one revolution, the turn of yarn A- will move one pitch from the position A299 to the position A900 shown in Figure 10 which is spaced from the position B299 from which the yarn B is discharged. As the yarns A and B are thus separated at the discharge points,

s they will be separated from each other as they are discharged from the device during the continued operation of the device.

This invention may be used in handling 3 or more yams together on yarn-storage yarn-advancing devices in much the same manner as two yarns are handled. The guide means for diregting the yarns to the yarn-storage'yarn-advancing devices are each provided with a plurality of spaced apart thread directing grooves or guide ways, one for each yarn that is handled. In shifting the yarns laterally to eiiect the separation of the yarns at the discharge end, all but one of the yarns are shifted laterally and positioned in the guide way with the yarn that had not been shifted. For example in handling three yarns a guide means is used having three spaced apart yarn guide ways. The yarn in the middle is shifted laterally one space and is placed in one of the outside guide ways with the yarn therein. The yarn in the other outside guide way is shifted laterally to the first outside guide way and is placed in that guide way with the two yarns therein.

The invention is not limited to the use of viscose in forming the yarns but may employ other filament-forming materials such, for example, as cellulose esters, cellulose ethers, resins, proteins, and compatible mixtures of these materials. The yarns that are spun may be of diiferent denier, and instead of spinning the plurality of yarns of the same filament-forming material, the yarns may be formed from dissimilar filament-forming materials. For this latter purpose a vertical partition 29 may be employed in the chamber for the spinning bath 9 as shown in Figure 4 so that the spinnerets may be positioned in different types of baths. Also at the dry end of. the apparatus after separating the yarns A and B as shown in Figure 4, the yarns whether the same or different in character may be doubled or twisted together to form a plied yarn. Further, instead of employing a relatively long yarn-storage yamadvancing device on which the yarn may be subjected to a number of diiferent treating liquids, the invention may be practiced with apparatus having a multiplicity of spaced relatively-short yarnstorage yarn-advancing devices on each of which the yarn may be subjected to only one treating liquid.

I claim:

1. Apparatus for handling a. plurality of yarns together comprising a yarn-storage yarn-advancing device having a certain pitch for advancing helical turns of the yarns along the device, guide means for directing yarns to the device positioned adjacent one end of the device having a plurality of yarn directing means positioned adjacent one end of the device and spaced from each other along the device a distance apprtoigmately equal to a whole number times the pi e 2. Apparatus for handling a plurality of yarns together comprising a yarn-storage yam-advancing device having a certain pitch for advancing helical turns of the yarns along the device, guide means for directing the yarns to the device positioned adjacent one end of the device having two yarn directing means positioned adjacent one end of the device and spaced from each other along the device a distance approximately equal to a whole number times the pitch.

3. Apparatus for handling a plurality of yarns together comprising a plurality of yarn-storage yarn-advancing devices each having a certain pitch for advancing helical turns of yarns along the devices, guide means for directing the yarns to each device positioned adjacent one end of each device, each of said guide means having a plurality of yarn directing means positioned adjacent one end of a device and spaced from each other alon a device a distance approximately equal to a whole number times the pitch of the device to which the guide means directs the yarns.

4. Apparatus for forming a plurality of artiiicial yarns and for handling those yams together comprising spinneret means for forming the yarns, a yarn-storage yarn-advancing device having a certain pitch for advancing along the device helical turns of the yarns that are formed, guide means for directing the yarns to the device positioned adjacent one end of the device, said guide means having a plurality of yarn directing means positioned adjacent one end of the device and spaced from each other along the device a distance approximately equal to a whole number times the pitch.

5. Apparatus for forming two artificial yarns and for handling the two yarns together comprising, two spinnerets, a yarn-storage yarn-advancing device having a certain pitch for advancing along the device helical turns of the two yarns that are formed, guide means for directing yarns to the device positioned adjacent one end of the device, said guide means having two yarn directing means positioned adjacent one end of the device and spaced from each other along the device a distance approximately equal to a whole number times the pitch.

6. Apparatus for forming two artificial yarns and for handling the two yarns togethercomprising, two spinnerets, a plurality of yam-storage yarn-advancing devices each having a certain pitch for advancing helical turns of the yarns together along the devices, guide means for directing yarns to each of the devices positioned adjacent one end of each device, each of said guide means having a plurality of yarn directing means positioned adjacent one end of a device and spaced from each other along a device a distance approximately equal to a whole number times the pitch of the device to which the guide means directs the yarns.

7. Apparatus for forming two artificial yarns and for handling the two yarns together comprising, two spinnerets, a, plurality of yarnestorage yarn-advancing devices each having a certain pitch for advancing helical turns of the yarns together along the devices, guide means for directing yarns to each of th devices positioned adjacent one end of each device, each of said guide means having a plurality of yarn directing means positioned adjacent one end of a device and spaced from each other along a device a distance approximately equal to a whole number times the pitch of the device to which the guide means directs the yarns, and means for applying treating liquid to the yarns on one of the yarn-storage yarn-advancing devices.

8. The method of handling a plurality of yarns together on a yarn-storage yarn-advancing device'having a certain pitch comprising, directing the yarns to the device with the yarns spaced from each other a distance that is approximately equal to a whole number times the pitch, forming a plurality of turns of the yarns on the device each turn comprising the said yarns in proximity to each other, shifting the position of yarns being directed to the device laterally along the device a distance approximately equal to a whole number 10 times the pitch to form a turn of yarns inproximity to each other comprising two turns of the yarns that had been laterally shifted.

9. The method of handling two yarns together on a yam-storage yam-advancing device having a' certain pitch, comprising directing the two yarns to the device with the yarns spaced from each other by a distance that is approximately a whole number times the pitch, forming a plurality of turns of the yarns on the device each turn comprising the two yarns in proximity to each other, shifting the position of one of the yarns being directed to the device laterally along the device a distance that is approximately equal to a whole number times the pitch to form a turn or yarns in proximity to each other comprising two turns of the yarn that had been shifted.

10. The method of handling two yarns together on a yarn-storage yarn-advancing device having a certain pitch comprising directing the yarns to the device with the yarns spaced from each other a distance that is approximately equal to a whole number times the pitch, forming a plurality of turns of the yarns on the device each turn comprising the said yarns in proximity to each other, shifting the position of one of the yarns being directed to the device laterally along the device in the direction of the other yarn being directed to the device, a distance approximately equal to a whole number times the pitch of the device.

11. The method of handling two yarns together on a yarn-storage yam-advancing device having a yam delivery portion near one end and a yarn discharge portion near the other end and having a certain pitch comprising, directing the two yarns to the device with the yarns spaced from each other along the device a distance that is approximately equal to a whole number times, the pitch, forming a plurality of turns of the yarns on the device each turn comprising the said yarns in proximity to each other and shifting the position of the yarn being delivered to the device that is nearer the discharge end of the device laterally along the device toward the yarn delivery portion a distance approximately equal to a whole number times the pitch.

12. The method of handling two yarns together on a yarn-storage yarn-advancing device having a yarn delivery portion and a yarn discharge portion and having a certain pitch comprising directing the two yarns, to the device with the yarns spaced Iromeach other along the device a distance that is approximately equal. to a whole number times the pitch, forming a plurality of turnsot the yarns on the device each turn comprising the said yarns in proximity to each other and shifting the position of the yarn being delivered to the device that is nearer the yarn delivery end of the device, toward the discharge end of the device a distance that is approximately equal to a whole number times the pitch.

13. The method of handling two yarns together on a plurality of yam-storage yarn-advancing devices each having a certain pitch comprising, directing the yarns to one or the devices with the yarns spaced from each other a distance that is approximately equal to a whole number times the pitch of that device, forming a plurality of helical turns of the yarns on that device, each turn comprising the two yarns in proximity to each other, and shifting the position of one of the yarns being directed to the device laterally along the device a distance that is approximately equal to a whole number times the pitch of that device to form a turn of the yarns in proximity to each other comprising two turns of the yarn that had been shifted, directing the two yarns together to another yarn-storage yarn-advancing device, separating the yarns being directed to the other device a distance that is approximately equal to a whole number times the pitch of that device, forming a plurality of turns of the yarns together on the other device each turn comprising the two yarns in proximity to each other, and shifting the position of one of the yarns being directed to the device laterally along the device a distance that is approximately equal ta 9. whole number times the pitch of the device to form a turn of the yarns in proximity to each other comprising two turns of the yarns that had been shifted.

14. The method of handling two yarns together on a plurality of yam-storage yarn-advancing devices each having a certain pitch comprising directing the yarns to one of the devices with the yarns spaced from each other a distance that is approximately equal to a whole number times the pitch, forming a plurality of turns of the yarns on the device each turn comprising the said yarns in proximity to each other, shifting the position of one of the yarns being directed to the device, laterally along the device in the direction of the other yarn being directed to the device, a distance approximately equal to a whole number times the pitch of the device, directing the yarns together to another yarn-storage yarn-advancing device, separating the yarns being directed to said other yam-storage yarn-advancing device a distance approximately equal to a whole number times the pitch of that device, forming a plurality of turns of the yarns together on that device each turn comprising the said yarns in proximity to each other, and shifting the position of one of the yarns being directed to that device laterally along the device in the direction of the other yarn being directed to that device a distance approximately equal to a whole number times the pitch of that device.

15. The method of forming two artificial yarns and of handling the two yarns together on a yarnstorage yam-advancing device having a certain pitch comprising extruding yarn forming material through two spinnerets, directing the yarns that are formed to the device with the yarns spaced from each other a distance that is approximately equal to a whole number times the pitch. forming a plurality of turns of the yarns on the device each turn comprising the said yarns in proximity to each other, shifting the position of one of the yarns being directed to the device laterally along the device in the direction of the 12 other yarn being directed to the device, a distance approximately equal to a whole number times the pitch of the device.

16. The method of forming two artificial yarns and oi handling the two arms together on a plurality of yam-storage yarn-advancing devices each having a certain pitch comprising extruding yarn forming material through two spinnereta, directing the yarns that are formed to one of the devices with the yarns spaced from each other a distance that is approximately equal to a whole number times the pitch, forming a plurality of turns of the yarns on the device each turn comprising the said yarns in proximity to each other,

- shifting the position of one of the yams being directed to the device laterally along the device in the direction of the other yarn being directed to the device, a distance approximately equal to a whole number times the pitch of the device, directing the yarns together to another yarn-storage yarn-advancing device, separating the yarns being directed to said other yam-storage yarnadvancing device a distance approximately equal to a whole number times the pitch of that device. forming a plurality of turns of the yarns together on that device each turn comprising the said yarns in proximity to each other, and shifting the position of one of the yarns being directed to that device laterally along the device in the direction of the other yarn being directed to that device a distance approximately equal to a whole number times the pitch of that device.

17. Apparatus for handling a plurality of yarns together comprising a yam-storage yam-advancing device having a certain pitch for advancing helical turns of the yarns along the device, guide means for directing yarns to the device positioned adjacent one end of the device having a plurality of yarn directing means positioned adjacent one end 01' the device and spaced from each other along the device a distance approximately equal to the pitch of the device.

HENRY J. MCDERMOTT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,243,964 Kline et al June 3, 1941 2,251,212 Grogan July 29, 1941 2,294,871 Sellner Sept. 1, 1942 2,369,481 Modigliani Feb. 13, 1945 

